Research on Structure and Mechanical Properties of Epoxy Resin/Clay Nanocomposites by Shock Wave Method

2012 ◽  
Vol 501 ◽  
pp. 366-371 ◽  
Author(s):  
Guang Yi Lin ◽  
Xue Chen Mu ◽  
Dian Wei Qu
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Shock Wave ◽  
Epoxy Resin ◽  
Process Condition ◽  
Interlayer Spacing ◽  
Clay Nanocomposites ◽  
Wave Method ◽  
Optimal Process ◽  
Elongation At Break

Epoxy resin / clay nanocomposites prepared by shock wave method. The structure and mechanical properties including hardness, stress, strain and elongation at break were investigated. XRD was used to observe the interlayer spacing of the OMMT and SEM was used to survey the morphology of nanocomposites system. The results indicated that nano-montmorillonite can effectively increase the mechanical property of the material. The nano-montmorillonite was well dispersed in the epoxy matrix. The optimal process condition is that shock time 5min, nano-MMT content of 5%, duty cycle 1:3, shock depth 3cm.

scholarly journals Effect of Organic Modifier Types on the Physical–Mechanical Properties and Overall Migration of Post-Consumer Polypropylene/Clay Nanocomposites for Food Packaging

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1502
Author(s):  
Eliezer Velásquez ◽  
Sebastián Espinoza ◽  
Ximena Valenzuela ◽  
Luan Garrido ◽  
María José Galotto ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Food Packaging ◽  
Clay Nanocomposites ◽  
Organic Modifier ◽  
Thermal And Mechanical Properties ◽  
Chemical Safety ◽  
Elongation At Break ◽  
Fatty Food ◽  
Recycled Plastics ◽  
Thermal Stability Of

The deterioration of the physical–mechanical properties and loss of the chemical safety of plastics after consumption are topics of concern for food packaging applications. Incorporating nanoclays is an alternative to improve the performance of recycled plastics. However, properties and overall migration from polymer/clay nanocomposites to food require to be evaluated case-by-case. This work aimed to investigate the effect of organic modifier types of clays on the structural, thermal and mechanical properties and the overall migration of nanocomposites based on 50/50 virgin and recycled post-consumer polypropylene blend (VPP/RPP) and organoclays for food packaging applications. The clay with the most hydrophobic organic modifier caused higher thermal stability of the nanocomposites and greater intercalation of polypropylene between clay mineral layers but increased the overall migration to a fatty food simulant. This migration value was higher from the 50/50 VPP/RPP film than from VPP. Nonetheless, clays reduced the migration and even more when the clay had greater hydrophilicity because of lower interactions between the nanocomposite and the fatty simulant. Conversely, nanocomposites and VPP/RPP control films exhibited low migration values in the acid and non-acid food simulants. Regarding tensile parameters, elongation at break values of PP film significantly increased with RPP addition, but the incorporation of organoclays reduced its ductility to values closer to the VPP.

scholarly journals A Study Regarding the Mechanical Properties of a Hybrid Matrix with Various Volume Proportions of Dammar

2020 ◽  
Vol 57 (1) ◽  
pp. 133-140
Author(s):  
Dumitru Bolcu ◽  
Marius Marinel Stanescu ◽  
Ion Ciuca ◽  
Cosmin Mihai Miritoiu ◽  
Alin Dinita ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Vibration Mode ◽  
Vibration Damping ◽  
The Other ◽  
Damping Properties ◽  
Elongation At Break ◽  
Hybrid Resin ◽  
Natural Resin ◽  
Volume Proportion

This paper studies the influence of the volume proportion between components on the mechanical behaviour of a hybrid resin obtained by combining the natural resin Dammar and epoxy resin. We analyse three sets of hybrid resin samples, in which we used a Dammar volume proportion of 60%, 70%, and 80% respectively and epoxy resin (employed together with its associated reinforcement in order to generate a quick process of polymerization). Following the tensile test we found the characteristic curves, the tensile strength and the elongation at break for each of the three types of resins. We also looked into the vibration damping properties of bars made of this resin. We experimentally determined the frequency and the damping coefficient of the first particular vibration mode for one bar taken out of each set of resins, with one end fixed and the other free. On the basis of the results, we calculated the loss coefficient for each type of resin.

Influence of Epoxide Levels in Epoxidized Natural Rubber (ENR) Molecules on Cure Characteristics, Dynamic Properties and Mechanical Properties of ENR/Montmorillonite Clay Nanocomposites

2013 ◽  
Vol 844 ◽  
pp. 247-250
Author(s):  
Piriyapol Yokkhun ◽  
Bencha Thongnuanchan ◽  
Charoen Nakason
Keyword(s):  
Mechanical Properties ◽  
Dynamic Properties ◽  
Montmorillonite Clay ◽  
Layered Silicates ◽  
Clay Nanocomposites ◽  
X Ray Diffraction ◽  
Melt Mixing ◽  
Maximum Torque ◽  
Elongation At Break ◽  
Cure Characteristics

Nanocomposites based on epoxidized natural rubbers (ENRs) with various levels of epoxide groups (i.e., 10, 20, 30, 40 and 50 mol%) and organoclay were prepared by melt mixing process. The organoclay employed in this study was montmorillonite clay modified by octadecylamine (OC-MMT). Cure characteristics, dynamic properties and mechanical properties of ENRs nanocomposites filled with 5 phr of OC-MMT were studied. In all cases, X-ray diffraction results indicated intercalation of ENRs into the silicate interlayer as an increase in the interlayer distance of layered silicates was observed. The maximum torque and torque difference of ENRs nanocomposites increased with increasing levels of epoxide groups in ENRs. Additionally, it was also found that the tan δ value at Tg of the ENR-50 nanocomposite was much lower than those of other types of ENRs nanocomposite. This indicates stronger interaction between ENR-50 and OC-MMT. However, ENR-50 nanocomposite showed the poorest elasticity in term of the tan δ value at the ambient temperature compared to other types of ENRs nanocomposites. A good balance between strength and elasticity was also observed in the ENR-30 nanocomposite. These results are also consistent with the observation that tensile strength and elongation at break of ENR-30 nanocomposite were higher than those of other types of ENRs nanocomposites.

THE EFFECTS OF OPFB SIZE ON THE MECHANICAL PROPERTIES OF OIL PALM FRUIT BUNCH FIBRE FILLED POLYPROPYLENE–CLAY NANOCOMPOSITES

2010 ◽  
Vol 09 (06) ◽  
pp. 563-566 ◽  
Author(s):  
ANIZAH KALAM ◽  
MOHAMAD NOR BERHAN ◽  
HANAFI ISMAIL
Keyword(s):  
Mechanical Properties ◽  
Oil Palm ◽  
Impact Test ◽  
Impact Resistance ◽  
Polymer Nanocomposite ◽  
Clay Nanocomposites ◽  
Hybrid Polymer ◽  
Palm Fruit ◽  
Elongation At Break ◽  
Scanning Electron

Oil palm fruit bunch (OPFB) fibre was used as filler in polypropylene–clay nanocomposite (PNC) to study its effect on the mechanical properties of OPFB filled PNC or hybrid polymer nanocomposite (HPNC). The OPFB size was varied at 250 μm, 180 μm, 125 μm and 100 μm. HPNC was prepared by compounding 20 wt.% of OPFB together with PNC. Tensile, flexural and impact test samples were injection moulded from the compounds according to ASTM standards. The experimental results showed that the increase of OPFB size in HPNC has increased the tensile and flexural moduli from 39% to 54% and 33% to 69%, respectively. Meanwhile, the tensile and flexural strengths increased as the OPFB size increases. The elongation at break and impact resistance were not affected by OPFB size. Scanning electron microscope result showed that the fracture surfaces of coarser OPFB filled polypropylene–clay nanocomposite has several mechanisms such as fibre pull-outs, fibre fracture and fibre delamination, whereas the PNC filled with finer OPFB exhibited ductile fracture.

Preparation of Epoxy/Montmorillonite Nanocomposite Coating and its Application in the High-Temperature Oil-Gas Environment with H2S

2010 ◽  
Vol 154-155 ◽  
pp. 508-514 ◽  
Author(s):  
Xian Fang Wang ◽  
Yin Chun Hu ◽  
Ya Ping Li ◽  
Qiong Zhou
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Epoxy Resin ◽  
Interlayer Spacing ◽  
Nanocomposite Coating ◽  
High Temperature And Pressure ◽  
Temperature And Pressure ◽  
Gas Environment ◽  
Intercalation Polymerization ◽  
Oil Gas

Montmorillonite was introduced into the multicomponent epoxy resin by using the intercalation polymerization. Intercalation effect of epoxy/montmorillonite composite system and the influence of the addition of montmorillonite on the glass transition temperature (Tg), mechanical properties and barrier of H2S to coating under high temperature and pressure conditions were investigated. The results showed that it was easy to intercalate epoxy resin into the organic montmorillonite layers, and the interlayer spacing of Montmorillonite was further swelled. In addition, the epoxy/montmorillonite nanocomposite coating with intercalated/ exfoliated structures were prepared. Compared to pure epoxy coating, the heat resistance and mechanical properties of epoxy/montmorillonite nanocomposite coating were slightly improved, and the barrier efficiency to H2S was substantially increased under high temperature and pressure oil-gas environment.

The Mechanical Properties of Low Cis-Butadiene Modified HIPS

2013 ◽  
Vol 744 ◽  
pp. 400-402
Author(s):  
Hui Ming Yao ◽  
Yong Liang Yuan ◽  
Xiao Yun Liu ◽  
Sheng Qiang Qian ◽  
Jian Long Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Particle Size ◽  
Impact Strength ◽  
Elongation At Break ◽  
Polymerization Condition

In this paper, low cis-butadiene (LCPB) is used in the process of polymerization of HIPS to study the influence of the polymerization condition on the particle size of rubber and mechanical property. It can be discovered from the study that the particle size was increased from 300nm to 500nm with the decreasing stir. The test of mechanical property shows that with the increase of content of rubber, elongation at break and impact strength on cantilever increase, but stretching strength decreases. On condition of 100 rpm, when the content of rubber increases from 3% to 9%, elongation at break increases from 21.9% to 25.0%, stretching strength decreases from 30.5 MPa to 23.9 MPa, and the cantilever impact strength increases from 5.4KJ/m2 to 9.3KJ/m2. On condition of 200 rpm, when the content of rubber increases from 3% to 9%, elongation at break increases from 21.4% to 29.1%, stretching strength decreases from 28.7 MPa to 20.8 MPa, and the cantilever impact strength increases from 5.2KJ/m2 to 8.1KJ/m2. Keywords: HIPS, mechanical properties, morphologies, T117 initiation

scholarly journals Molecular Dynamics Simulation for the Effect of Fluorinated Graphene Oxide Layer Spacing on the Thermal and Mechanical Properties of Fluorinated Epoxy Resin

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1344
Author(s):  
Qijun Duan ◽  
Jun Xie ◽  
Guowei Xia ◽  
Chaoxuan Xiao ◽  
Xinyu Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Molecular Dynamics ◽  
Graphene Oxide ◽  
Epoxy Resin ◽  
Interlayer Spacing ◽  
Thermal And Mechanical Properties ◽  
Layer Spacing ◽  
Fluorinated Graphene ◽  
Fluorinated Graphene Oxide ◽  
Fluorinated Epoxy

Traditional epoxy resin (EP) materials have difficulty to meet the performance requirements in the increasingly complex operating environment of the electrical and electronic industry. Therefore, it is necessary to study the design and development of new epoxy composites. At present, fluorinated epoxy resin (F-EP) is widely used, but its thermal and mechanical properties cannot meet the demand. In this paper, fluorinated epoxy resin was modified by ordered filling of fluorinated graphene oxide (FGO). The effect of FGO interlayer spacing on the thermal and mechanical properties of the composite was studied by molecular dynamics (MD) simulation. It is found that FGO with ordered filling can significantly improve the thermal and mechanical properties of F-EP, and the modification effect is better than that of FGO with disordered filling. When the interlayer spacing of FGO is about 9 Å, the elastic modulus, glass transition temperature, thermal expansion coefficient, and thermal conductivity of FGO are improved with best effect. Furthermore, we calculated the micro parameters of different systems, and analyzed the influencing mechanism of ordered filling and FGO layer spacing on the properties of F-EP. It is considered that FGO can bind the F-EP molecules on both sides of the nanosheets, reducing the movement ability of the molecular segments of the materials, so as to achieve the enhancement effect. The results can provide new ideas for the development of high-performance epoxy nanocomposites.

Preparation, Characterization and Physical Properties of Polyvinyl Alcohol-Layered Clay Nanocomposites

2014 ◽  
Vol 997 ◽  
pp. 433-437
Author(s):  
Hong Yan Tian ◽  
Yue Hui Wang ◽  
Chun Liu ◽  
Kui Niu
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Interlayer Spacing ◽  
Dynamic Mechanical Properties ◽  
Poly Vinyl Alcohol ◽  
Clay Nanocomposites ◽  
Casting Method ◽  
Photochemical Stability ◽  
Layered Clay ◽  
Double Hydroxide

This work focused on the preparation of poly (vinyl alcohol) (PVA)/ layered double hydroxide (LDH) and LDHSA nanocomposites by casting method. The morphology and interlayer spacing of the composites were characterized. The mechanical properties and the photochemical stability of the film of PVA, PVA/LDH and PVA/LDHSA have been studied and compared with PVA/MMT nanocomposites reported in previously. The results indicated that the thermal stability and dynamic mechanical properties of the PVA matrix in the PVA/LDH films and PVA/MMT films was enhanced. PVA/LDH films and PVA/OMMT films were shown stable photochemically more than those of pure PVA.

The Effect of Masked Isocyanates on the Mechanical Properties of My720/dds Epoxy Resin

1989 ◽  
Vol 171 ◽  
Author(s):  
N. Rungsimuntakul ◽  
S.V. Lonikar ◽  
R. E. Fornes ◽  
R.D. Gilbert
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Epoxy Resins ◽  
Moisture Absorption ◽  
Peak Stress ◽  
Fiber Composites ◽  
Elongation At Break ◽  
Initial Modulus ◽  
Better Than

ABSTRACTThe mechanical properties of epoxy resins and epoxy resin/graphite fiber composites are adversely affected by moisture absorption. Incorporation of masked isocyanates that unmask to release isocyanates in situ at the cure temperatures (150-177ºC) reduce the equilibrium absorption up to ∼70%. Dynamic mechanical analyses and stress-strain properties of epoxy resins containing masked isocyanates were examined to determine their effect on mechanical properties. The ultimate Tg of the epoxy is reduced by incorporation of masked isocyanate, but the actual Tg is comparable to the “as cured” Tg of the epoxy. The dynamic moduli up to the Tg are relatively unaffected. Ina number of cases, the initial modulus, elongation at break and peak stress are equal or better than the unmodified resins.

Effect of Organoclay Dispersion on the Barrier Performance and Mechanical Strength of EVA Clay Nanocomposites

2013 ◽  
Vol 747 ◽  
pp. 15-18
Author(s):  
Wilson Runcy ◽  
Kumar S. Anil ◽  
Thomas Sabu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Composite Membranes ◽  
Barrier Properties ◽  
Superior Performance ◽  
Clay Nanocomposites ◽  
Elongation At Break ◽  
Barrier Performance ◽  
Poly Ethylene ◽  
Cloisite 15A

Poly (ethylene-co-vinyl acetate) (EVA)/clay nanocomposites with different clay loadings were prepared. The transport of gases (oxygen and nitrogen) through the composite membranes was investigated. These studies revealed that the incorporation of nanoclays in the polymer increased the efficiency of the membranes toward barrier properties. It was also found that the barrier properties of the membranes decreased with clay loadings. This is mainly due to the aggregation of clay at higher loadings. The mechanical properties of the nanocomposites were analysed. Samples with 5 wt % Cloisite 15A clay showed superior performance in tensile strength and elongation at break.

Sign in / Sign up

Export Citation Format

Share Document